How can I get this shimmery/pearlescent fluid?
Try something like this. It's just a Noise Texture with the distortion and detail turned up, and flattened a bit on the Z-axis. I used the Noise as a Mix Factor for the colors and also used the colors for a bit of Subsurface Scattering. I used the inverse of the Noise for a bit of Transmission so the dark areas look more &quot;gooey&quot;. I upped the Metallic value a bit as well, because polishes like that often contain a metallic &quot;sheen: component.